Re: [eclipselink-users] @Embeddable and @mapsId

[christopher delahunt <christopher.delahunt@xxxxxxxxxx>]

Hello,

I'm not sure what to say, as the error is clear that the problem is it 
is trying to insert a value of 10005699 into B's id attribute - which is 
set to be a type of APK. 
Are you sure you have this set up correctly?  You are posting the BPK 
class when both A and B are now using APK, does the APK class look like 
the BPK? 
Maybe file a bug with a reproducible test case, as it is very difficult 
to determine what is going wrong with partial snippets, where anything 
excluded might be a factor
in your issue.  The test code provided does work though; it was pulled 
from EclipseLink's regression tests found within the model at:
http://fisheye2.atlassian.com/browse/eclipselink/trunk/jpa/eclipselink.jpa.test/src/org/eclipse/persistence/testing/models/jpa/advanced/derivedid

Best Regards,
Chris



luke2010 wrote:
> Chris, thanks for your solution. I followed it, and type the snippet below:
> =======
> @Entity 
>     public class A { 
>        @EmbeddedId APK id; 
>         ... 
>       @OneToOne(optional=false, mappedBy="a", cascade = ALL, targetEntity =
> B.class) 
>       @PrivateOwned 
>       private B b; 
>        ... 
>     } 
>
>     @Entity 
>     public class B { 
>        @EmbeddedId APK id; 
>         ... 
>                 
>         
>        @OneToOne(optional = false) 
>         @JoinColumns({ 
>                 @JoinColumn(name="A_ID", referencedColumnName="A_ID"), 
>                 @JoinColumn(name="B_ID", referencedColumnName="B_ID"), 
>                 }) 
>                 @MapsId
>                 private A a; 
>     } 
>   
>   
>   @Embeddable 
>     public class BPK { 
>                 @Column(name="A_ID") 
>        int aId name; 
>             
>            @Column(name="B_ID") 
>        long bId; 
>     } 
> ===============================
>
> I tried @MapsId or @MapsId("id"), either of them works for me. and here is
> the error message I got 
> ----------------
> Thread(Thread[Main Thread,5,main])--Exception [EclipseLink-32] (Eclipse
> Persistence Services - 2.0.1.v20100213-r6600):
> org.eclipse.persistence.exceptions.DescriptorException
> Exception Description: Trying to set value [10005699] for instance variable
> [id] of type [com.entities.copy.APK] in the object.  The specified object is
> not an instance of the class or interface declaring the underlying field, or
> an unwrapping conversion has failed.
> Internal Exception: java.lang.IllegalArgumentException: Can not set
> com.entities.copy.APK field com.entities.copy.B.id to java.lang.String
> Mapping: org.eclipse.persistence.mappings.AggregateObjectMapping[id]
>
> ===================================
>
> luke2010 wrote:
>   
> > here is one scenario
> > there are two entity A, B, A has PK class APK including aId, bId, B has
> > BPK class including aId, bId as well. they have oneToone relationship. Can
> > I use annotation @MapsId on @OnetoOne relationship on entity B? 
> >
> > ==========================
> >     @Entity
> >     public class A {
> >        @EmbeddedId APK id;
> >         ...
> > 		
> >        
> >       @OneToOne(optional=false, mappedBy="a", cascade = ALL, targetEntity
> > = B.class)
> >       @PrivateOwned
> >       private B b;
> >        ...
> >     } 
> >
> >     @Entity
> >     public class B {
> >        @EmbeddedId BPK id;
> >         ...
> > 		
> >        
> >        @OneToOne(optional = false)
> > 	@JoinColumns({
> > 		@JoinColumn(name="A_ID", referencedColumnName="A_ID"),
> > 		@JoinColumn(name="B_ID", referencedColumnName="B_ID"),
> > 		})
> > 		@MapsId ??????
> > 		private A a;
> >     }
> >  
> >  
> >   @Embeddable
> >     public class BPK {
> > 		@Column(name="A_ID")
> >        int aId name;
> > 	   
> > 	   @Column(name="B_ID")
> >        long bId; 
> >     }
> > ======================================
> > I tried @MapsId at the question mark location, but I don't know which
> > attribute name to provide. If i dont' provide anything, i got error below: 
> >
> > ---------------------------------
> > Caused by: Exception [EclipseLink-7316] (Eclipse Persistence Services -
> > 2.0.1.v20100213-r6600):
> > org.eclipse.persistence.exceptions.ValidationException
> > Exception Description: The mapped by id value [a] from the mapping
> > attribute [field a] is invalid. An equivalent attribute with that name
> > must be defined on the id class [class com.package.BPK]
> >
> >     
>
>